Hi, I am trying to conduct some pool boiling experiments using nanofluids for my final year thesis at the University of Western Australia. I was really impressed with your video and was wondering if you could share with me how you managed to ensure such high quality visual contrast between the bubbles and the heating surface i.e. how did you install the camera, what type of camera was used (frames per second) etc. Any help would be greatly appreciated. Kind Regards, Hugo Breakey
Hi. It is a microgravity experiment, rihgt? I would like to know if it would be the same scenario with large amounts of water. I am imagining a huge space ship during an interplanetary travel. Assume that is moving in the vacuum of the space with one of his chambers totally filled with 30.000 galloons of fresh water. Let me also assume that suddenly some astronauts decide to do scuba diving in the middle of the mass of water. Then a terrible accident occurs: the pressurized chamber opens and all is ejected to the vacuum. My question is if it might be possible that in the surface of the ejected mass of water, after boiling, a frozen crust can be formed permitting to maintain the divers alive in the liquid core, at least while they can hold their breaths.
+Carlos Alberto Avendaño Restrepo Hi. No. This has nothing to do with microgravity. It's a boiling experiment with high surface temperatures enabling the so called "film boiling" wich is an undesirable condition for industrial pourposes. The experiment is entirely done at sea level gravity. About your question: Water an average 25ºC in space boils violently due to the lack of pressure in the surroundings. Then, the resulting vapor freezes inmediatle due to the loss of heat by radiation (yes, gas also radiates) since the background temperature of space is onli 2,7K. Liquid water can't freeze inmediately due to the little (in comparison) surface area exposed for losing heat by radiation. The overall efect is water turning into fine ice dust. Furthermore, the ice dust is expelled a very high speed in all directions due to the pressure release when the water boiled in first place.
fantanstic!
Hi,
I am trying to conduct some pool boiling experiments using nanofluids for my final year thesis at the University of Western Australia. I was really impressed with your video and was wondering if you could share with me how you managed to ensure such high quality visual contrast between the bubbles and the heating surface i.e. how did you install the camera, what type of camera was used (frames per second) etc.
Any help would be greatly appreciated.
Kind Regards,
Hugo Breakey
Hello! Great video! can you say what frame rate you were using on the camera? Thank you!
Superb!
Hi. It is a microgravity experiment, rihgt? I would like to know if it would be the same scenario with large amounts of water. I am imagining a huge space ship during an interplanetary travel. Assume that is moving in the vacuum of the space with one of his chambers totally filled with 30.000 galloons of fresh water. Let me also assume that suddenly some astronauts decide to do scuba diving in the middle of the mass of water. Then a terrible accident occurs: the pressurized chamber opens and all is ejected to the vacuum. My question is if it might be possible that in the surface of the ejected mass of water, after boiling, a frozen crust can be formed permitting to maintain the divers alive in the liquid core, at least while they can hold their breaths.
+Carlos Alberto Avendaño Restrepo Hi. No. This has nothing to do with microgravity. It's a boiling experiment with high surface temperatures enabling the so called "film boiling" wich is an undesirable condition for industrial pourposes. The experiment is entirely done at sea level gravity.
About your question: Water an average 25ºC in space boils violently due to the lack of pressure in the surroundings. Then, the resulting vapor freezes inmediatle due to the loss of heat by radiation (yes, gas also radiates) since the background temperature of space is onli 2,7K. Liquid water can't freeze inmediately due to the little (in comparison) surface area exposed for losing heat by radiation. The overall efect is water turning into fine ice dust. Furthermore, the ice dust is expelled a very high speed in all directions due to the pressure release when the water boiled in first place.